UPDATE: Dodge County Sheriff Dale Schmidt held a press conference Monday morning to discuss the search for the three teens who went missing last night.

The Iron Ridge Fire Department and several other agencies have been working to find the boys.

The boys bikes were found in the area of an abandoned mine.

The mine was built in 1915 and donated to UWM in 1964. Conditions inside the mine are cold and dark.

The sheriff said he did not know if the boys are in the mine, but they are searching the mine.

It has numerous entry points.

So far there are no signs of injuries to the boys.

Search dogs were brought in from nearby departments, and the DNR's plane is flying over to help with the search and with thermal imaging. .

They tried to use a drone but there was too much tree coverage.

ORIGINAL: Dodge County authorities are searching for three missing teenage boys in the area of Iron Ridge. The boys, 16-year-old Zachary Heron, 16-year-old Tate Rose and 15-year-old Samuel Lein, were reported missing late Sunday night in the area of Neda Road and Ore Road in the Town of Hubbard. The Dodge County Sheriff’s Office, the Joint Unified Command and the Iron Ridge Fire Department are conducting the search. According to the Sheriff’s Office, the search is being conducted in a heavily wooded with old mine tunnels throughout making which makes the area difficult to traverse. The public is asked to stay clear of the area to make the search effort more effective. A news conference is scheduled for 8:30 this morning at the Iron Ridge Fire Department.